Homework Help: eng physics

Posted by anthony on Saturday, October 30, 2010 at 3:57am.

in a downhill race a skier slides down a 40 degree slope. starting from rest how far must he slide down the slope to reach a speed of 130 km/hr. ignore air friction and assume the co effiecnt of kinetic friction between skies and snow is .1

eng physics - bobpursley, Saturday, October 30, 2010 at 7:46am
ForceNet=mg

but force net= mg*CosTheta-friction
net force= mg*cosTheta-mu*mg*SinTheta

set that equal to ma, solve for a.

Now, knowing a
Vf^2=Vi^2+2ad solve for distance d.

put velocities in m/s

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